# std::stop_callback_for_t

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< cpp‎ | thread

Defined in header `<stop_token>` |  |
template< class T, class CallbackFn > using stop_callback_for_t = T::template callback_type<CallbackFn>; |  | (since C++26)

The alias template `stop_callback_for_t` is used to obtain the stop callback type of the type `T`.

### Notes

The corresponding `stop_callback_for_t` for standard stop token types and any valid `CallbackFn` are:

- specialization of std::stop_callback for std::stop_token,
- specialization of std::inplace_stop_callback for std::inplace_stop_token, and
- unspecified type without stoppable callback registration and deregistration for std::never_stop_token.

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